Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bcc8d8906d6f787…

MALICIOUS

PDF

34.5 KB Created: 2020-08-01 16:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c217d9c6eb97d005a2772aaf330cbe5d SHA-1: 4fcbe761006aa492bcbe5a7b2dfb89282fc1f344 SHA-256: 8bcc8d8906d6f7879ebba8d9252161cd1b7cd8408fcad505f9ec1146e836812d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link disguised as a solutions manual, aiming to trick users into clicking it. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the link leads to malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, common in SEO poisoning attacks. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=university+calculus+alternate+edition+solutions+manual+pdf In PDF document text
    • http://files.theaterleagueofclifton.com/uploads/1/3/0/9/130968968/xapokix-folidajev-molev.pdfIn PDF document text
    • http://files.thekansasbeecompany.com/uploads/1/3/1/4/131454151/xuxupijubi.pdfIn PDF document text
    • http://files.ppmglobal.services/uploads/1/3/1/4/131437445/lizibajitakiwi-memos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/87393744573.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8311/1323/files/fiximukero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/julubivej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1961/6935/files/93858229941.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0203/5354/files/pisulemavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7873/0403/files/backup_bookmarks_firefox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5917/3790/files/pokemon_ruby_fossils.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/reragijod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3268/2397/files/xutavitumobugipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6004/3682/files/29671580918.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48A2 5452 bytes
SHA-256: 4215b91cb99261c85082d896e07092e66e73d43253faaae34a3eafb4738aed42
font_01_sfnt_off00005b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B29 9956 bytes
SHA-256: 7946c5eb3117f24127b2982d0524cae8c19e0738347284f1cbc8fa209993b217

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